#include <iostream>
#include <vector>

using namespace std;

void test() {
    int a = 0;
    while (true) {
        cin >> a;
        switch (a) {
        case 1:
            cout << "this is 1" << endl;
            break;
        case 2:
        case 3:
            cout << "this is 2 or 3" << endl;
            break;
        case 0:
            cout << "break from while" << endl;
            break;
        default:
            break;
        }
    }
}

void test01() {
    vector<int> my_vec(16);
}

void test02() {
    for (size_t i = 0; i < 10; i++)
    {
        if (i < 5) {
            if (i == 3) {
                cout << "i = 3, break" << endl;
                break;
            }
            cout << "i < 5 " << endl;
        }
    }
    
}

int main() {

    test02();
    return 0;
}